We should also backup any files in the innodb_log_group_home_dir
We should also backup any files in the innodb_log_group_home_dir

There's likely to be files there over time, other than the redo
logs which are in the subdir.

Signed-off-by: Matt Lord <5c2d6cb5cc654501c0d86e59cab3211bbda644af@gmail.com>

mahak/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess